A set of 56 2D polygons, which fit together to build polyhedrons and 3D volumetric shapes. It comes with transparent activity sheets with increasing difficulty levels, that can be used on light tables. It also includes an instructions booklet that focuses on hands-on mathematical learning. Includes 56 pieces (each piece measures 2.75"H), 8 transparent game cards, and 1 brochure. Ages 5 and up.